flutter pub add dart_des基于插件公开信息、社区数据与项目使用情况整理的选型参考。
dart_des 是数据加密标准（DES）和三重 DES 加密算法的纯 Dart 实现。它提供了安全、平台无关的加密操作，适用于需要对称密钥加密的应用程序。该包支持所有主要平台，包括 Android、iOS、Web、macOS、Windows 和 Linux，非常适合需要传统或标准化加密的跨平台应用程序。它不依赖原生代码，确保在各种环境中的行为一致。该库专为需要实现基于 DES 的加密且无需外部依赖的开发者设计。
以下为关联源码仓库的 README 原文快照，最新内容请访问源码仓库。
This algorithm is a pure dart implementation of the DES and Triple DES algorithms (port of pyDES). Triple DES is either DES-EDE3 with a 24 byte key, or DES-EDE2 with a 16 byte key.
import 'dart:convert';
import 'package:convert/convert.dart';
import 'package:dart_des/dart_des.dart';
main() {
String key = '12345678'; // 8-byte
String message = 'Driving in from the edge of town';
List<int> encrypted;
List<int> decrypted;
List<int> iv = [1, 2, 3, 4, 5, 6, 7, 8];
print('key: $key');
print('message: $message');
DES desECB = DES(key: key.codeUnits, mode: DESMode.ECB);
encrypted = desECB.encrypt(message.codeUnits);
decrypted = desECB.decrypt(encrypted);
print('DES mode: ECB');
print('encrypted: $encrypted');
print('encrypted (hex): ${hex.encode(encrypted)}');
print('encrypted (base64): ${base64.encode(encrypted)}');
print('decrypted: $decrypted');
print('decrypted (hex): ${hex.encode(decrypted)}');
print('decrypted (utf8): ${utf8.decode(decrypted)}');
key = '123456781234567812345678'; // 24-byte
DES3 des3CBC = DES3(key: key.codeUnits, mode: DESMode.CBC, iv: iv);
encrypted = des3CBC.encrypt(message.codeUnits);
decrypted = des3CBC.decrypt(encrypted);
print('Triple DES mode: CBC');
print('encrypted: $encrypted');
print('encrypted (hex): ${hex.encode(encrypted)}');
print('encrypted (base64): ${base64.encode(encrypted)}');
print('decrypted: $decrypted');
print('decrypted (hex): ${hex.encode(decrypted)}');
print('decrypted (utf8): ${utf8.decode(decrypted)}');
}